2981. Find Longest Special Substring That Occurs Thrice I

Welcome to the solution walkthrough for LeetCode 2981: "Find Longest Special Substring That Occurs Thrice"!

In this video, we’ll break down a clever approach to identifying the longest substring composed of a single repeated character (a "special substring") that appears at least three times in the given string. Our solution organizes potential candidates by their length, checks their occurrences efficiently, and returns the maximum length if found—or -1 if not.

By watching this, you’ll gain insights into:

How to systematically generate all special substrings.
Leveraging data structures (maps and sets) to store and manage substrings by length.
Optimising the search for multiple occurrences with built-in string operations.

Dive in and discover a neat, structured way to solve this intriguing problem—and sharpen your problem-solving toolkit in the process!